Phys. Rev. Lett. 94, 240403 (2005) [4 pages]Fermionization in an Expanding 1D Gas of Hard-Core BosonsReceived 26 October 2004; published 22 June 2005 We show by means of an exact numerical approach that the momentum distribution of a free expanding gas of hard-core bosons on a one-dimensional lattice approaches that of noninteracting fermions, acquiring a Fermi edge. Yet there is a power-law decay of the one-particle density matrix ρx∼1/√x, as usual for hard-core bosons in the ground state, which accounts for a large occupation of the lowest natural orbitals for all expansion times. The fermionization of the momentum distribution function, which is not observed in equilibrium, is analyzed in detail. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.240403
DOI:
10.1103/PhysRevLett.94.240403
PACS:
03.75.Kk, 03.75.Lm, 05.30.Jp
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.